Exploring the Triangle Sum Theorem

What is a triangle?

• A figure with four sides

• A figure with three openings

• A figure with two line segments

• A closed figure with three line segments

Tags

CCSS.2.G.A.1

What does the Triangle Sum Theorem state?

• The sum of the angles in a triangle is 270 degrees

• The sum of the angles in a triangle is 90 degrees

• The sum of the angles in a triangle is 360 degrees

• The sum of the angles in a triangle is 180 degrees

Tags

CCSS.8.G.A.5

If angle A is 100 degrees and angle C is 55 degrees, what is angle B?

• 55 degrees

• 25 degrees

• 35 degrees

• 45 degrees

Tags

CCSS.8.G.A.5

In Example 1, what variable is used to represent the unknown angle?

• w

• x

• z

• y

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

In Example 2, what is the value of x?

• 0

• 8

• 10

• -8

Tags

CCSS.8.G.A.5

What is the measure of the angle that is x + 83 degrees in Example 2?

• 65 degrees

• 75 degrees

• 85 degrees

• 95 degrees

Tags

CCSS.7.G.B.5

In Example 3, what is the measure of angle R?

• 58 degrees

• 100 degrees

• 32 degrees

• 90 degrees

Tags

CCSS.7.G.B.5

What is the measure of angle S in Example 3?

• 90 degrees

• 32 degrees

• 58 degrees

• 100 degrees

Tags

CCSS.7.G.B.5

What is the measure of angle T in Example 3?

• 90 degrees

• 100 degrees

• 32 degrees

• 58 degrees

Tags

CCSS.7.G.B.5

What is the sum of the angles in a right triangle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees

Tags

CCSS.8.G.A.5